Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b9bb3085babf7d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-28 20:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bfc766616432b031bc7d821c62e8e9be SHA-1: 43725c6d0c0f71ee9974436a9c2bc55a5c2b39be SHA-256: e7b9bb3085babf7d3ce6d8c29b5fd8f74580cfac794a90a2eb395dc7244b20c7
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/123?utm_term=sony+cyber+shot+rx100+iii+price+in+pakistan PDF link annotation
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/wisejerali.pdfIn PDF document text
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/xodewijo-kiwivesumawaj-gebaxa.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/2660514.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/jigdTSL/tetris_ultimate_pc_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/djj4ibA/heroes_vs_monsters_ios_11_download.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/70e185c4947637c.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/tijulesuvutafe.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/xubotilopogekorutidikr2v.pdfIn PDF document text
    • http://losqutoq.online/a_travs_de_mi_ventana_libro6cdii.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/gohgieh/dragonvale_breeding_cave_upgrade_price.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/hdOgdhi/1._1._1._1_faster_safer_internet_apk.pdfIn PDF document text
    • http://webdefilmizle.com/xenopetctjl.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/nidenas.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/8641824.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/latin_american_masks_purpose.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 5660 bytes
SHA-256: 60b3e7a6ce84f35da1b0eadb0af15511698836c598273325c1d8cd8837221665
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 11112 bytes
SHA-256: 2617cdc2e39ffd8813dfa92b95e68a36237c0f9b6ab84c6e0d687a5604899fbd

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